Which OSI layer handles flow control, data segmentation, and reliability?1 pointApplicationPhysicalTransportData Link

Sure, let's break down the question step by step to identify which OSI layer handles flow control, data segmentation, and reliability.

1. Flow Control: This is the process of managing the rate of data transmission between two nodes to prevent a fast sender from overwhelming a slow receiver. Flow control is crucial for ensuring that data is transmitted efficiently and without errors.

2. Data Segmentation: This involves dividing a large block of data into smaller, manageable pieces for transmission. Each segment can be sent independently and reassembled at the destination.

3. Reliability: This refers to the mechanisms that ensure data is delivered accurately and in the correct order. It includes error detection and correction, as well as acknowledgment of received data.

Now, let's look at the OSI layers and see which one is responsible for these functions:

• Application Layer: This layer provides network services directly to end-user applications. It does not handle flow control, data segmentation, or reliability.

• Physical Layer: This layer deals with the physical connection between devices and the transmission of raw bitstreams over a physical medium. It does not handle flow control, data segmentation, or reliability.

• Transport Layer: This layer is responsible for end-to-end communication and provides reliable data transfer services to the upper layers. It handles flow control, data segmentation, and reliability. Protocols like TCP (Transmission Control Protocol) operate at this layer to ensure that data is delivered accurately and in the correct order.

• Data Link Layer: This layer is responsible for node-to-node data transfer and error detection/correction on the physical link. While it does provide some level of error handling, it does not handle flow control and data segmentation in the same way the Transport Layer does.

Given this information, the correct answer is:

Transport Layer

The Transport Layer handles flow control, data segmentation, and reliability.